Normally $49.99, this invaluable service lets you send mail at designated times and "snooze" messages so they reappear later on. Rick Broida is the author of numerous books and thousands of reviews, ...

Boomerang makes Gmail do a few things you wish it could do on its own. The namesake feature sends an email back to you if your recipient hasn't replied or opened your email by a time that you set. In ...